s1.find('q')=4
s1.find('q')=4
s2.find('q')=-1
s2.find('q')=-1
s1.find("quick")=4
s1.find("quick")=4
s2.find("quick")=-1
s2.find("quick")=-1
s1.find("brown")=10
s1.find("brown")=10
s2.find("brown")=-1
s2.find("brown")=-1
s1.rfind('o')=17
s1.rfind('o')=17
s2.rfind('o')=22
s2.rfind('o')=22
s1.find_first_of("qrs")=4
s1.find_first_of("qrs")=4
s2.find_first_of("qrs")=10
s2.find_first_of("qrs")=10
s1.find_last_of("qrs")=11
s1.find_last_of("qrs")=11
s2.find_last_of("qrs")=10
s2.find_last_of("qrs")=10
s1.find_first_of("qrs")=4
s1.find_first_of("qrs")=4
s2.find_first_of("qrs")=10
s2.find_first_of("qrs")=10
s1.find_last_of("qrs")=11
s1.find_last_of("qrs")=11
s2.find_last_of("qrs")=10
s2.find_last_of("qrs")=10
s1.find_first_not_of("eth ")=4
s1.find_first_not_of("eth ")=4
s2.find_first_not_of("eth ")=0
s2.find_first_not_of("eth ")=0
s1.find_last_not_of("dog")=18
s1.find_last_not_of("dog")=18
s2.find_last_not_of("dog")=20
s2.find_last_not_of("dog")=20
s1.find_first_not_of("eth ")=4
s1.find_first_not_of("eth ")=4
s2.find_first_not_of("eth ")=0
s2.find_first_not_of("eth ")=0
s1.find_last_not_of("dog")=18
s1.find_last_not_of("dog")=18
s2.find_last_not_of("dog")=20
s2.find_last_not_of("dog")=20
s1.find_first_of("")=-1
s1.find_first_of("")=-1
s1.find_last_of("")=-1
s1.find_last_of("")=-1
s1.find_first_not_of("")=0
s1.find_first_not_of("")=0
s1.find_last_not_of("")=18
s1.find_last_not_of("")=18
s7.find_first_of("asye")=0
s7.find_first_of("asye")=0
s7.find_last_of("asye")=3
s7.find_last_of("asye")=3
s7.find_first_not_of("asye")=-1
s7.find_first_not_of("asye")=-1
s7.find_last_not_of("asye")=-1
s7.find_last_not_of("asye")=-1
